What dietary factor is associated with an increased risk of dental caries?

The correct response highlights that high consumption of sugary foods and beverages is closely linked to an increased risk of dental caries, commonly known as cavities. Sugars from foods and drinks feed the bacteria that reside in the mouth. When these bacteria metabolize the sugars, they produce acids as byproducts, which can erode tooth enamel and lead to caries formation.

In contrast, the other dietary factors listed do not contribute to an elevated risk of dental caries. An increased intake of fruits can provide valuable vitamins and minerals that contribute positively to oral health, although some fruits have natural sugars; their overall fiber content and water content can help cleanse the mouth. Whole grains can also be beneficial, as they are high in fiber and generally have a lower glycemic index than sugary foods, which helps regulate blood sugar levels. Low-fat dairy products are rich in calcium and other nutrients that are important for maintaining healthy teeth and bones, potentially reducing the risk of dental caries. Thus, while various dietary elements play roles in oral health, sugary items stand out as a primary culprit in the development of dental caries.